Github user harshach commented on a diff in the pull request:
https://github.com/apache/storm/pull/1679#discussion_r82825994
--- Diff:
external/storm-kafka-client/src/main/java/org/apache/storm/kafka/spout/KafkaSpout.java
---
@@ -266,26 +266,31 @@ private void doSeekRetriableTopicPartitions() {
if (offsetAndMeta != null) {
kafkaConsumer.seek(rtp, offsetAndMeta.offset() + 1); //
seek to the next offset that is ready to commit in next commit cycle
} else {
- kafkaConsumer.seekToEnd(toArrayList(rtp)); // Seek to
last committed offset
+ kafkaConsumer.seek(rtp, acked.get(rtp).committedOffset +
1); // Seek to last committed offset
}
}
}
// ======== emit =========
private void emit() {
- emitTupleIfNotEmitted(waitingToEmit.next());
- waitingToEmit.remove();
+ while(!emitTupleIfNotEmitted(waitingToEmit.next()) &&
waitingToEmit.hasNext()) {
+ waitingToEmit.remove();
+ }
}
- // emits one tuple per record
- private void emitTupleIfNotEmitted(ConsumerRecord<K, V> record) {
+
+ //Emits one tuple per record
+ //@return true if tuple was emitted
+ private boolean emitTupleIfNotEmitted(ConsumerRecord<K, V> record) {
final TopicPartition tp = new TopicPartition(record.topic(),
record.partition());
final KafkaSpoutMessageId msgId = new KafkaSpoutMessageId(record);
if (acked.containsKey(tp) && acked.get(tp).contains(msgId)) { //
has been acked
LOG.trace("Tuple for record [{}] has already been acked.
Skipping", record);
+ return false;
--- End diff --
why are we adding returns here. Having one return makes the method look
cleaner. This is an if else conditions and we are returning false at the end.
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